He was asking how to bracket aperture not EV stops... just wondering what would be the need to bracket apertures???
Just select shutter priority mode on the D700, push the bracket button and adjust with the main dial to get 3 exposure, then adjust with the subcommand dial to let it know what exposure difference you want between the shots.
It should all be explained in the manual under the bracketing chapter (it's been a while since I checked the manual though). The shutter priority is less used for bracketing since we often use the bracketing function to make HDRs. In this case, since the 3 exposures will be blended, if we were to use shutter priority, the 3 exposures would have different depth of field and it probably would not process as well.
Hope this helps.